/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/ViewModels/Stack/NiagaraStackFunctionInput.h
Gets the handle to the linked value for this input if there is one.
const [FNiagaraParameterHandle](API\Plugins\NiagaraEditor\ViewModels\Stack\FNiagaraParameterHandle) & GetLinkedValueHandle() const